\begin{tikzpicture}
  \begin{scope}[x=0.7cm, y=0.7cm, step=0.7cm, thick]
    \board{3}{3};  
    \qb{(2,2)};
    \qw{(1,3)};
    \arrow{(2, 1)};
    \arrow{(1, 1)};
    \arrow{(3, 2)};
    \arrow{(3, 3)};
  \end{scope}
\end{tikzpicture}

% 5 W . X X .
% 4 . B X X .
% 3 X X . X .
% 2 X X X X .
% 1 . . . . .
%   A B C D E 
% P-class
